she deletes Bella's number IF you have it at that moment, but there is nothing stopping you getting it again iirc... she only checks your phone once when she enters hers.What I’ve seen with the rose character, she removes one of the contacts from the Phone the Bella character but the other thing also I’ve noticed with the hints system is it not very accurate just and there’s one will you pick her up and now I’m at the park apparently something about getting invited to a dinner or something like that but it’s not happening and the character or something like that that characters looking for a key
as for the rest you'll need to try again I'm struggling to understand what you are saying.
Are you talking about Dorothy? after a certain stage you can visit her during Dinner time (if you want her daughter to be there you will need to pick her up), she has also lost a key that will give you access to her home whenever you want (she is searching her bedroom, but you want to look in her laundry)